Direct measurements of controlled aerodynamic forces on a wire-suspended axisymmetric body |
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Authors: | Philip Abramson Bojan Vukasinovic Ari Glezer |
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Institution: | (1) Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA; |
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Abstract: | A novel in-line miniature force transducer is developed for direct measurements of the net aerodynamic forces and moments
on a bluff body. The force transducers are integrated into each of the eight mounting wires that are utilized for suspension
of an axisymmetric model in a wind tunnel having minimal wake interference. The aerodynamic forces and moments on the model
are altered by induced active local attachment of the separated base flow. Fluidic control is effected by an array of four
integrated aft-facing synthetic jet actuators that emanate from narrow, azimuthally segmented slots, equally distributed around
the perimeter of the circular tail end. The jet orifices are embedded within a small backward-facing step that extends into
a Coanda surface. The altered flow dynamics associated with both quasi-steady and transitory asymmetric activation of the
flow control effect is characterized by direct force and PIV measurements. |
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